NE synchronisation test
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Overview
This test ensures protected synchronisation of the NE to external clock
sources.
Important! The test must only be carried out for NEs with connected
external clock sources.
Procedure
Proceed as follows to complete the NE synchronisation test:
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1
If not already done connect an external clock source to both external
timing input ports located on the rear side of the subrack.
Use a 2.048 MHz or 2.048 Mbit/s framed signal for SDH, and a 1.544
Mbit/s framed signal for SONET.
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2
Login to the NE as described in Chapter 6, section
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3
Select
Configuration
→
Timing/Sync
in the System view.
Result:
The window
Synchronisation Characteristics
appears.
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4
Assign the first clock source.
Select the tab
External Input 1
and set the following parameters:
•
Select the
Input Signal Format
depending on the input signal.
•
Set the
SSM Support
field to
Supported
in the case of
2 Mbit/s
- framed
(SDH mode) or
ESF
(SONET mode) external timing
input signals. In all other cases select
Not Supported
.
Select the tab
External Reference 1
and set the following parameters:
•
Select
PRC
(SDH) or
PRS
(SONET) in the
Provisioned Quality
Level
drop-down list box.
•
Select the priority
1
in the drop-down list box
System Timing
Reference Prioriy
.
Stand alone test procedures
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7 - 6
Lucent Technologies
365-374-074
Issue a, April 2002